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Reference Manual
00809-0100-4631, Rev BA
April 2007
Rosemount 1154 Series H
5-2
SAFETY MESSAGES
Instructions and procedures in this section may require special precautions to
ensure the safety of the people performing the operations. Information that
raises potential safety issues is indicated by a warning message. The
following warning messages appear in this section.
TEST TERMINALS
The test terminals are connected across a diode through which the loop
signal current passes. The indicating meter or test equipment shunts the
diode when connected to the test terminals. As long as the voltage across the
terminals is kept below the diode threshold voltage, no current passes
through the diode. To ensure that there is no current leaking through the diode
when making a test reading or when connecting an indicating meter, the
resistance of the test connection or meter should not exceed 10
Ω
.
BOARD CHECKOUT
NOTE
Numbers in parentheses refer to item numbers in Figure 5-2 on page 5-6.
NOTE
The Rosemount 1154 Series H Pressure Transmitter contains electronic
circuit boards which may be static sensitive.
You can easily check the printed circuit boards (5 and 6) for a malfunction by
substituting spare boards into the circuit. If this procedure turns up a
malfunctioning board, return the defective board to Rosemount Nuclear
Instruments, Inc. for replacement. Because of parts traceability, qualification
becomes the responsibility of the customer in the event of unauthorized board
repairs.
Figure 5-1. Header Board
Connections.
SENSING MODULE
CHECKOUT
NOTE
Numbers in parentheses refer to item numbers in Figure 5-2 on page 5-6.
The sensing module is contained within the module shroud (8) and is not field
repairable. If no defect such as loss of fill fluid is observed, check the sensing
module in the following manner.
Use only the procedures and new parts specifically referenced in this manual to ensure
specification performance and certification compliance. Unauthorized procedures or parts
can render the instrument dangerous to life, limb, or property.
(Component Side Up)
1151-0180A
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